This issue (BCREC Volume 15 Issue 1 Year 2020) has been available online since 28th February 2020 for the regular issue of April 2020. All articles in this issue (25 original research articles) include 73 Authors from 12 countries of origin (China, Algeria, Indonesia, India, Iraq, Islamic Republic of Iran, Japan, Republic of Korea, Malaysia, Thailand, Taiwan, and Viet Nam).

For the section of The International Symposium of Green Engineering and Technology 2019 (ISGET 2019), this section was co-editored by Dr. Harumi Veny as a Guest Editor, and editored by Prof. Dr. I. Istadi as Editor in Chief.